Note possibility of "SNP-flip" due to misreported orientation; the rs121908034(G;G) genotype is exceedingly rare, so if you're seeing these comments, either you're using a chip (like many from 23andMe) that has erroneously flipped the orientation of this SNP, and you actually carry the far more common (C;C) genotype, or far less likely, you actually carry this genotype and the risk for familial hypercholesterolemia.